/**
 * Copyright 2015 Confluent Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 **/

/**
 * Original license:
 *
 * Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE
 * file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file
 * to You under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the
 * License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
 * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations under the License.
 */
package io.confluent.common.utils;

import java.util.concurrent.TimeUnit;

/**
 * A clock that you can manually advance by calling sleep
 */
public class MockTime implements Time {

  private long nanos;

  public MockTime() {
    this.nanos = System.nanoTime();
  }

  @Override
  public long milliseconds() {
    return TimeUnit.MILLISECONDS.convert(this.nanos, TimeUnit.NANOSECONDS);
  }

  @Override
  public long nanoseconds() {
    return nanos;
  }

  @Override
  public void sleep(long ms) {
    this.nanos += TimeUnit.NANOSECONDS.convert(ms, TimeUnit.MILLISECONDS);
  }

  public void reset(long ms) {
    this.nanos = ms;
  }

}
